Managing Maintenance

Every cluster and replication group has a weekly maintenance window during
which any system changes are applied. If you don't specify a preferred maintenance
window when
you create or modify a cluster or replication group, ElastiCache assigns a 60-minute
maintenance window
within your region's maintenance window on a randomly chosen day of the week.

The 60-minute maintenance window is chosen at random from an 8-hour block of time
per region. The following table lists the time blocks for each region from which
the
default maintenance windows are assigned.
You may choose a preferred maintenance window outside the region's maintenance window
block.

Region Code

Region Name

Region Maintenance Window

ap-northeast-1

Asia Pacific (Tokyo) Region

13:00–21:00 UTC

ap-northeast-2

Asia Pacific (Seoul) Region

12:00–20:00 UTC

ap-northeast-3

Asia Pacific (Osaka-Local) Region

12:00–20:00 UTC

ap-south-1

Asia Pacific (Mumbai) Region

17:30–1:30 UTC

ap-southeast-1

Asia Pacific (Singapore) Region

14:00–22:00 UTC

ap-southeast-2

Asia Pacific (Sydney) Region

12:00–20:00 UTC

cn-north-1

China (Beijing) region

14:00–22:00 UTC

eu-central-1

EU (Frankfurt) Region

23:00–07:00 UTC

eu-west-1

EU (Ireland) Region

22:00–06:00 UTC

eu-west-2

EU (London) Region

23:00–07:00 UTC

sa-east-1

South America (São Paulo) Region

01:00–09:00 UTC

us-east-1

US East (N. Virginia) Region

03:00–11:00 UTC

us-east-2

US East (Ohio) Region

04:00–12:00 UTC

us-gov-west-1

AWS GovCloud (US) region

06:00–14:00 UTC

us-west-1

US West (N. California) Region

06:00–14:00 UTC

us-west-2

US West (Oregon) Region

06:00–14:00 UTC

Changing your Cluster's or Replication Group's Maintenance Window

The maintenance window should fall at the time of lowest usage and thus might need
modification from time to time. You can modify your cluster or replication group
to specify a time range of up to 24 hours in duration during which any maintenance
activities you have requested should occur. Any deferred or pending cluster modifications
you requested occur during this time.